MENNA A FAROUK A concert by Moroccan singer Saad Lamjarred, who has been repeatedly accused of rape, has been cancelled in Egypt after a social media outcry, reflecting a growing resolve to speak out against sex crimes. The popular Arab artist, whose 2015 song "Lamaallem" has been viewed 860 million times on YouTube, was arrested on rape charges three times since 2010 in the United States and France. Neither Lamjarred nor his business manager were immediately available for comment. Lamjarred has previously denied all charges and the first two cases have been dismissed. "It is already cancelled," Magdy El Hawary,…